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400-060-0105

PET英语语法核心突破:What引导四类从句的深度解析与应用指南

来源:北京学为贵青少英语 时间:03-31

PET英语语法核心突破:What引导四类从句的深度解析与应用指南

PET语法必学:What从句的核心地位与学习意义

在PET(初级英语考试)的语法体系中,名词性从句是重点考察模块,而What引导的从句因其灵活性和高频性,成为考生必须掌握的核心知识点。无论是阅读中的长难句分析,还是写作中的复杂句式运用,What从句都扮演着关键角色。更重要的是,PET考试常通过完形填空、语法填空等题型,直接考察考生对What从句结构与功能的理解。因此,系统掌握What引导的四类从句(主语从句、宾语从句、表语从句、同位语从句),是提升语法得分率的重要突破口。

类:What引导的主语从句——句子的“起点担当”

主语从句是位于句首、承担主语功能的从句。当What引导主语从句时,它不仅是从句的引导词,还在从句内部充当成分(如主语、宾语或表语),这是其区别于其他无实际意义的引导词(如That)的关键特征。

以经典例句为例:What really matters is that she wore a pair of white shoes. 这里的What从句“What really matters”整体作为句子的主语,而What在从句中又直接充当“matters”的主语(“真正重要的事”)。翻译为中文更易理解:“真正麻烦的是她穿了一双白鞋。”需要注意的是,主语从句在PET考试中常以“it作形式主语”的变体出现,例如:It is unclear what he will do next.(他下一步会做什么还不清楚),此时What从句被后置,it仅为形式主语,实际主语仍是What引导的从句。

考试易错点提示:部分考生易将What主语从句与That主语从句混淆。需明确That在主语从句中不充当成分,仅起连接作用(如:That he failed the exam is surprising.),而What必须在从句中承担实际成分,这是两者的本质区别。

第二类:What引导的宾语从句——信息传递的“核心载体”

宾语从句是位于及物动词或介词之后、充当宾语的从句。What引导宾语从句时,同样需在从句中承担成分,常见于动词(如say、hear、know)或介词(如about、for)之后,用于传递具体的信息内容。

看一个典型例句:People have heard what the President has said; they are waiting to see what he will do. 前半句中,What从句“What the President has said”是动词“heard”的宾语,What在从句中作“said”的宾语(“总统所说的内容”);后半句中,What从句“What he will do”是动词“see”的宾语,What在从句中作“do”的宾语(“他将要做的事”)。中文翻译为:“人们已经听到了总统所说的;他们正等着看总统会做什么。”

实际应用技巧:在PET写作中,合理使用What宾语从句可增强句子的信息密度。例如,表达“我无法想象他经历了什么”时,用I can't imagine what he has gone through. 比简单句更符合英语表达习惯,也更能体现语法功底。

第三类:What引导的表语从句——主语属性的“精准描述”

表语从句位于系动词(如be、become、seem)之后,用于说明主语的性质、状态或身份。What引导表语从句时,其核心作用是对主语进行具体的描述或定义,从句内容与主语形成“等价关系”。

以例句The little girl is no longer what she used to be. 为例,What从句“What she used to be”位于系动词“is”之后,作为表语说明主语“The little girl”的变化。What在从句中作“be”的表语(“过去的样子”),整句话的意思是“这个小女孩不再是过去的样子了”。

考试常见题型:PET语法填空中,常出现需要判断系动词后应填入What还是其他引导词的题目。例如:My life is ______ I make it.(我的生活是我自己创造的),此处需用What引导表语从句,因为What在从句中作“make”的宾语(“我创造的东西”)。

第四类:What引导的同位语从句——抽象名词的“具体阐释”

同位语从句通常跟在抽象名词(如idea、news、fact)之后,对名词的具体内容进行解释说明。What引导同位语从句时,从句与前面的名词是“等同关系”,即从句内容是名词所指的具体信息。

看两个经典例句:I have no idea what he is doing.(我不知道他正在做什么)和You have no idea what I suffered.(你不知道我所遭受的痛苦)。在句中,What从句“What he is doing”是抽象名词“idea”的同位语,具体说明“idea”的内容;第二句中,What从句“What I suffered”同样解释“idea”(“你不知道的事”)。需要注意的是,同位语从句与定语从句容易混淆——定语从句是对名词的修饰限制(如The idea that he gave is useful. 中That从句修饰“idea”),而同位语从句是对名词的内容补充(如The idea that we should study harder is good. 中That从句说明“idea”的具体内容)。

学习建议:掌握同位语从句的关键是识别抽象名词后的“解释关系”。在PET阅读中,遇到类似“I have no clue...”“There is no doubt...”等结构时,其后的What从句通常为同位语从句,理解其内容对把握句子核心信息至关重要。

PET备考:What从句的实战应用与提分策略

掌握What引导的四类从句,不仅要理解理论,更要结合PET考试特点进行针对性训练:

  1. **真题精读**:收集近5年PET真题中涉及What从句的题目(如语法填空、完形填空),分析出题规律。例如,语法填空中常考察What在从句中的成分判断(作主语/宾语/表语),需结合句子结构具体分析。
  2. **写作运用**:在写作练习中主动使用What从句,提升句式丰富度。例如,描述个人经历时可用What impressed me most was...(最让我印象深刻的是...),表达观点时可用I believe what we need is...(我认为我们需要的是...)。
  3. **易错总结**:整理练习中因混淆What从句与其他从句(如That从句、Which从句)导致的错误,制作对比表格(如引导词成分、从句功能、典型例句),定期复习强化记忆。

总之,What引导的四类从句是PET语法的核心考点,通过系统学习结构特点、结合真题训练、总结易错点,考生完全可以突破这一难点,为PET考试的语法模块打下坚实基础。

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  136. /data/web/baijiao_branch_collect/view/index/pc/school_bottom.php ( 1.16 KB )
  137. /data/web/baijiao_branch_collect/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000424s ] mysql:host=127.0.0.1;port=3306;dbname=baijiao_branch_collect;charset=utf8
  2. SHOW FULL COLUMNS FROM `fqi_school` [ RunTime:0.001326s ]
  3. SELECT * FROM `fqi_school` WHERE `school_id` = '3425' AND `site_id` = 3 AND `school_status` = 1 LIMIT 1 [ RunTime:0.001070s ]
  4. SHOW FULL COLUMNS FROM `fqi_school_class` [ RunTime:0.000681s ]
  5. SELECT * FROM `fqi_school_class` WHERE `school_id` = 3425 [ RunTime:0.000598s ]
  6. SHOW FULL COLUMNS FROM `fqi_school_campus` [ RunTime:0.000673s ]
  7. SELECT * FROM `fqi_school_campus` WHERE `school_id` = 3425 [ RunTime:0.001819s ]
  8. SHOW FULL COLUMNS FROM `fqi_school_news` [ RunTime:0.002127s ]
  9. SELECT `a`.*,`content` FROM `fqi_school_news` `a` LEFT JOIN `fqi_school_news_content` `b` ON `b`.`content_id`=`a`.`content_id` WHERE `school_id` = 3425 AND `a`.`content_id` = '20870' AND `news_status` = 1 AND `school_status` = 1 LIMIT 1 [ RunTime:0.000748s ]
  10. (select content_id,news_name,school_id from fqi_school_news where school_id = '3425' and content_id < '20870' and site_id <= '3' order by content_id desc limit 1) union all(select content_id,news_name,school_id from fqi_school_news where school_id = '3425' and content_id > '20870' and site_id <= '3' order by content_id asc limit 1) [ RunTime:0.000875s ]
  11. SHOW FULL COLUMNS FROM `fqi_school_course` [ RunTime:0.000837s ]
  12. SELECT * FROM `fqi_school_course` WHERE `school_id` = 3425 AND `site_id` = 3 AND `course_status` = 1 AND `school_status` = 1 ORDER BY `course_id` DESC LIMIT 4 [ RunTime:0.000919s ]
  13. SELECT * FROM `fqi_school_course` WHERE `school_id` = 3425 AND `school_status` = 1 AND `course_status` = 1 ORDER BY `course_id` DESC LIMIT 8 [ RunTime:0.000232s ]
  14. SELECT * FROM `fqi_school_news` WHERE `school_id` = 3425 ORDER BY `click` DESC,`news_id` DESC LIMIT 5 [ RunTime:0.000204s ]
  15. SELECT `content_id`,`news_name`,`a`.`school_id`,`b`.`school_name` FROM `fqi_school_news` `a` LEFT JOIN `fqi_school` `b` ON `b`.`school_id`=`a`.`school_id` WHERE `a`.`site_id` = '3' AND `b`.`school_status` = '1' AND `news_status` = 1 AND `content_id` < 20870 ORDER BY `content_id` DESC LIMIT 20 [ RunTime:0.005219s ]
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